ok, which firewall are you referring to? The user tested on more then one occasion with his firewall off and the same result. The system is using the ISP firewall and ports 120,121, 42000 tot 42010 are open, portforwarding is set correctly and of course in pure-ftpd.conf 42000 to 42010 is PassivePortsRange. FTP server was restarted more then once and just to be sure reboot also done. The result does not change. Could you be a bit more specific and explain what else there is that can cause a firewall problem ?

I know, everything is set for port 121 and not for 21 we have a reason for that, but as you can see in the top of this post, that is not the problem, the problem is the hangs and the loops when logged in on port 121